organic compounds
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The title molecule, C20H23NO2S, adopts a twisted conformation in which the two aromatic rings connected to the central piperidine ring are orientated trans to each other. An intramolecular C—HS contact occurs. In the crystal, C—Hπ and C—HO interactions act to stabilize the structure in three dimensions.
organic compounds
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The title compound, C13H17NO3, adopts a conformation in which the aromatic ring and the mean plane of the piperidine ring are almost perpendicular to each other [dihedral angle = 79.25 (6)°]. The presence of the carbonyl group alters the conformation of the piperidine ring from a chair to a twisted half-chair conformation. In the crystal, pairs of strong O—HO hydrogen bonds link the molecules into inversion dimers. Weak C—HO interactions extend the hydrogen-bonding network into three dimensions.
organic compounds
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The title compound, C21H24O9, crystallizes with two independent molecules in the asymmetric unit which are almost centrosymmetrically related to each other. The ethanoate group in one of the two molecules is disordered over two positions with a site-occupation factor of 0.880 (7) for the major occupied site. In the crystal, the 1,3-diketone group exists in the keto–enol isomeric form due to the stabilizing effect of the intramolecular O—HO hydrogen bond present in this form. The compound packs as a layered structure in which C—Hπ and C—HO interactions are present within and between the layers.
organic compounds
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The title indole derivative, C17H15NO3S, crystallizes with two independent molecules in the asymmetric unit. The benzene ring of the tosyl group is almost perpedicular to the indole ring in both molecules, with interplanar angles of 82.60 (5)° and 81.82 (6)°. The two molecules are, as a consequence, able to form an almost centrosymmetric non-bonded dimer, in which the molecules are linked by pairs of C—Hπ interactions. The crystal structure displays a three-dimensional network of C—HO interactions. A π–π interaction occurs between inversion-related indole rings with a centroid–centroid distance of 3.6774 (16) Å and an interplanar angle of 1.53 (15)°. This interaction leads to a stacking of molecules along the a axis.